:root {
  --bg: #060b14;
  --bg-elevated: #0c1220;
  --bg-card: rgba(14, 22, 38, 0.72);
  --bg-code: #0d1526;
  --border: rgba(110, 231, 183, 0.12);
  --border-strong: rgba(110, 231, 183, 0.28);
  --text: #eef2ff;
  --text-muted: #8b9cb8;
  --accent: #6ee7b7;
  --accent-dim: #34d399;
  --accent-glow: rgba(110, 231, 183, 0.35);
  --warn: #fbbf24;
  --error: #f87171;
  --link: #7dd3fc;
  --radius: 14px;
  --radius-sm: 8px;
  --font: "Plus Jakarta Sans", system-ui, -apple-system, sans-serif;
  --mono: "IBM Plex Mono", "Cascadia Code", Consolas, monospace;
  --sidebar-w: 280px;
  --topbar-h: 56px;
  --transition: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  min-height: 100vh;
  overflow-x: hidden;
}

a { color: var(--link); text-decoration: none; }
a:hover { color: var(--accent); }

/* ── Animated background ── */
.bg-mesh {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.bg-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.45;
  animation: float 18s ease-in-out infinite;
}

.bg-orb-1 {
  width: 520px; height: 520px;
  background: radial-gradient(circle, #1a3a2e 0%, transparent 70%);
  top: -120px; left: -80px;
}

.bg-orb-2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, #0e2a4a 0%, transparent 70%);
  bottom: -100px; right: -60px;
  animation-delay: -6s;
}

.bg-orb-3 {
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(110, 231, 183, 0.15) 0%, transparent 70%);
  top: 40%; left: 50%;
  animation-delay: -12s;
}

.bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(110, 231, 183, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(110, 231, 183, 0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black 20%, transparent 80%);
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -20px) scale(1.05); }
  66% { transform: translate(-20px, 15px) scale(0.95); }
}

/* ── Layout ── */
.layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  min-height: 100vh;
}

.content-wrap {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

/* ── Sidebar ── */
.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  background: rgba(10, 16, 28, 0.82);
  backdrop-filter: blur(20px) saturate(1.4);
  border-right: 1px solid var(--border);
  padding: 1.25rem 1rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.sidebar-close { display: none; }

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: background var(--transition);
}

.brand-link:hover {
  background: rgba(110, 231, 183, 0.06);
  text-decoration: none;
}

.brand-logo-wrap {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  border-radius: 12px;
  background: linear-gradient(135deg, #0a1628, #0f1f35);
  border: 1px solid var(--border-strong);
  display: grid;
  place-items: center;
  box-shadow: 0 0 24px rgba(110, 231, 183, 0.12);
  transition: box-shadow var(--transition), transform var(--transition);
}

.brand-link:hover .brand-logo-wrap {
  box-shadow: 0 0 32px var(--accent-glow);
  transform: translateY(-1px);
}

.logo-svg { width: 36px; height: 36px; }

.logo-face { transition: filter 0.3s; }
.brand-link:hover .logo-face { filter: brightness(1.15); }

.logo-arrow {
  stroke-dashoffset: 0;
  animation: dash-flow 2.5s linear infinite;
}

.logo-arrow-1 { animation-delay: 0s; }
.logo-arrow-2 { animation-delay: 0.4s; }
.logo-arrow-3 { animation-delay: 0.8s; }

.logo-node { animation: pulse-node 2s ease-in-out infinite; }
.logo-node:nth-child(8) { animation-delay: 0s; }
.logo-node:nth-child(9) { animation-delay: 0.3s; }
.logo-node:nth-child(10) { animation-delay: 0.6s; }

@keyframes dash-flow {
  to { stroke-dashoffset: -12; }
}

@keyframes pulse-node {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.brand { font-size: 1.2rem; font-weight: 700; color: var(--accent); letter-spacing: -0.02em; }
.brand-sub { font-size: 0.72rem; color: var(--text-muted); margin-top: 0.1rem; }

/* Lang switch */
.lang-switch {
  display: flex;
  gap: 0.35rem;
  margin: 0.5rem 0;
}

.lang-btn {
  flex: 1;
  padding: 0.4rem 0.5rem;
  border: 1px solid var(--border);
  background: rgba(6, 11, 20, 0.6);
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.78rem;
  font-weight: 600;
  font-family: var(--font);
  transition: all var(--transition);
}

.lang-btn:hover { border-color: var(--accent); color: var(--accent); }

.lang-btn.active {
  background: rgba(110, 231, 183, 0.12);
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 16px rgba(110, 231, 183, 0.1);
}

/* Search */
.search-wrap {
  position: relative;
  margin: 0.5rem 0 0.75rem;
}

.search-icon {
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.search-input {
  width: 100%;
  padding: 0.55rem 2.5rem 0.55rem 2.25rem;
  background: rgba(6, 11, 20, 0.7);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font);
  font-size: 0.85rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.search-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(110, 231, 183, 0.12);
}

.search-input::placeholder { color: var(--text-muted); opacity: 0.7; }

.search-kbd {
  position: absolute;
  right: 0.6rem;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--mono);
  font-size: 0.65rem;
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  border: 1px solid var(--border);
  color: var(--text-muted);
  background: rgba(0,0,0,0.3);
  pointer-events: none;
}

/* Nav */
.nav-section {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin: 0.75rem 0 0.4rem 0.35rem;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.5rem 0.65rem;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 0.88rem;
  font-weight: 500;
  transition: all var(--transition);
  border: 1px solid transparent;
}

.nav-icon {
  width: 1.25rem;
  text-align: center;
  font-size: 0.85rem;
  opacity: 0.7;
}

.nav-link:hover, .nav-link.active {
  background: rgba(110, 231, 183, 0.08);
  color: var(--accent);
  border-color: rgba(110, 231, 183, 0.15);
  text-decoration: none;
}

.nav-link.active .nav-icon { opacity: 1; }

.sidebar-footer {
  margin-top: auto;
  padding-top: 1rem;
}

.sidebar-gh {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.65rem;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 0.82rem;
  border: 1px solid var(--border);
  transition: all var(--transition);
}

.sidebar-gh:hover {
  color: var(--text);
  border-color: var(--border-strong);
  background: rgba(110, 231, 183, 0.05);
  text-decoration: none;
}

/* ── Topbar ── */
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0 1.5rem;
  background: rgba(6, 11, 20, 0.75);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

.topbar-title {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-muted);
  flex: 1;
}

.topbar-actions { display: flex; gap: 0.5rem; }

.theme-hint {
  width: 32px; height: 32px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.9rem;
  transition: all var(--transition);
  opacity: 0;
  pointer-events: none;
}

.theme-hint.visible { opacity: 1; pointer-events: auto; }
.theme-hint:hover { border-color: var(--accent); color: var(--accent); }

.progress-bar {
  position: absolute;
  bottom: 0; left: 0;
  height: 2px;
  width: 0%;
  background: linear-gradient(90deg, var(--accent-dim), var(--accent));
  transition: width 0.1s linear;
  box-shadow: 0 0 8px var(--accent-glow);
}

/* ── Main content ── */
.main {
  flex: 1;
  padding: 1.5rem 2.5rem 4rem;
  max-width: 920px;
  animation: page-in 0.35s ease-out;
}

.main.page-exit { animation: page-out 0.15s ease-in forwards; }

@keyframes page-in {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes page-out {
  to { opacity: 0; transform: translateY(-8px); }
}

/* ── Hero ── */
.hero {
  position: relative;
  margin: -0.5rem -1rem 2.5rem;
  padding: 2.5rem 1rem 2rem;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border-strong);
  background: linear-gradient(135deg, rgba(14, 22, 38, 0.9) 0%, rgba(10, 30, 28, 0.6) 100%);
}

.hero-glow {
  position: absolute;
  top: -50%; right: -20%;
  width: 60%; height: 150%;
  background: radial-gradient(ellipse, rgba(110, 231, 183, 0.12) 0%, transparent 65%);
  pointer-events: none;
}

.hero-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  background: rgba(110, 231, 183, 0.12);
  color: var(--accent);
  border: 1px solid var(--border-strong);
  margin-bottom: 1rem;
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--text) 30%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.75rem;
}

.hero-lead {
  color: var(--text-muted);
  font-size: 1.1rem;
  max-width: 540px;
  margin-bottom: 1.75rem;
}

.hero-terminal {
  max-width: 480px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 0.85rem;
  background: rgba(0, 0, 0, 0.35);
  border-bottom: 1px solid var(--border);
}

.terminal-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
}

.terminal-dot:nth-child(1) { background: #f87171; }
.terminal-dot:nth-child(2) { background: #fbbf24; }
.terminal-dot:nth-child(3) { background: #6ee7b7; }

.terminal-label {
  margin-left: 0.5rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-muted);
}

.terminal-body {
  margin: 0 !important;
  border: none !important;
  border-radius: 0 !important;
  padding: 1rem 1.25rem !important;
  background: var(--bg-code) !important;
  font-size: 0.9rem;
}

.terminal-cursor {
  display: inline-block;
  width: 8px;
  height: 1.1em;
  background: var(--accent);
  margin-left: 2px;
  vertical-align: text-bottom;
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

/* ── Typography ── */
h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.lead {
  color: var(--text-muted);
  font-size: 1.08rem;
  margin-bottom: 2rem;
}

h2 {
  font-size: 1.3rem;
  margin: 2.5rem 0 1rem;
  padding-bottom: 0.45rem;
  border-bottom: 1px solid var(--border);
  color: var(--accent-dim);
  scroll-margin-top: calc(var(--topbar-h) + 1rem);
}

h3 {
  font-size: 1.02rem;
  margin: 1.5rem 0 0.75rem;
}

p { margin-bottom: 1rem; }
ul, ol { margin: 0 0 1rem 1.25rem; }
li { margin-bottom: 0.35rem; }

/* ── Cards ── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1rem;
  backdrop-filter: blur(8px);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.card h3 { margin-top: 0; font-size: 1rem; }
.card p { font-size: 0.88rem; color: var(--text-muted); margin-bottom: 0; }

.card-interactive {
  display: block;
  color: inherit;
  cursor: pointer;
  text-decoration: none;
}

.card-interactive:hover {
  border-color: var(--border-strong);
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.25), 0 0 0 1px rgba(110, 231, 183, 0.08);
  text-decoration: none;
}

.card-interactive h3 { color: var(--accent); }
.card-interactive .card-arrow {
  display: inline-block;
  margin-top: 0.75rem;
  font-size: 0.8rem;
  color: var(--accent);
  opacity: 0;
  transform: translateX(-4px);
  transition: all var(--transition);
}

.card-interactive:hover .card-arrow { opacity: 1; transform: translateX(0); }

/* Workflow step cards */
.workflow-card {
  position: relative;
  padding-left: 2.5rem;
}

.workflow-step {
  position: absolute;
  left: 1rem;
  top: 1.25rem;
  width: 24px; height: 24px;
  border-radius: 50%;
  background: rgba(110, 231, 183, 0.15);
  border: 1px solid var(--accent);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 700;
  display: grid;
  place-items: center;
}

/* ── Code blocks ── */
pre, code { font-family: var(--mono); font-size: 0.84rem; }

code {
  background: var(--bg-code);
  padding: 0.15em 0.4em;
  border-radius: 5px;
  border: 1px solid var(--border);
}

.code-wrap {
  position: relative;
  margin: 1rem 0;
}

.code-wrap pre {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem 1.25rem;
  padding-right: 3.5rem;
  overflow-x: auto;
  margin: 0;
}

.code-wrap pre code { background: none; border: none; padding: 0; }

.copy-btn {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  padding: 0.3rem 0.55rem;
  font-size: 0.7rem;
  font-family: var(--font);
  font-weight: 600;
  color: var(--text-muted);
  background: rgba(6, 11, 20, 0.8);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  opacity: 0;
  transition: all var(--transition);
}

.code-wrap:hover .copy-btn { opacity: 1; }
.copy-btn:hover { color: var(--accent); border-color: var(--accent); }
.copy-btn.copied { color: var(--accent); border-color: var(--accent); }

pre:not(.code-wrap pre) {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem 1.25rem;
  overflow-x: auto;
  margin: 1rem 0;
}

pre code { background: none; border: none; padding: 0; }

/* ── Tables ── */
.table-wrap { overflow-x: auto; margin: 1rem 0; border-radius: var(--radius-sm); border: 1px solid var(--border); }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

th, td {
  text-align: left;
  padding: 0.65rem 0.85rem;
  border-bottom: 1px solid var(--border);
}

tr:last-child td { border-bottom: none; }
tr:hover td { background: rgba(110, 231, 183, 0.03); }

th { color: var(--accent); font-weight: 600; background: rgba(110, 231, 183, 0.04); }

/* ── Alerts ── */
.alert {
  border-radius: var(--radius-sm);
  padding: 1rem 1.25rem;
  margin: 1rem 0;
  border-left: 3px solid;
  backdrop-filter: blur(4px);
}

.alert-info { background: rgba(125, 211, 252, 0.06); border-color: var(--link); }
.alert-warn { background: rgba(251, 191, 36, 0.06); border-color: var(--warn); }
.alert-err { background: rgba(248, 113, 113, 0.06); border-color: var(--error); }
.alert strong { display: block; margin-bottom: 0.35rem; }

/* ── Commands ── */
.cmd-block {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 0.85rem;
  overflow: hidden;
  transition: border-color var(--transition);
}

.cmd-block:hover { border-color: var(--border-strong); }
.cmd-block.hidden { display: none; }

.cmd-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.1rem;
  cursor: pointer;
  user-select: none;
  gap: 1rem;
}

.cmd-header:hover { background: rgba(110, 231, 183, 0.04); }

.cmd-name {
  font-family: var(--mono);
  color: var(--accent);
  font-weight: 600;
  font-size: 0.9rem;
}

.cmd-chevron {
  color: var(--text-muted);
  font-size: 0.75rem;
  transition: transform var(--transition);
  flex-shrink: 0;
}

.cmd-block.open .cmd-chevron { transform: rotate(180deg); color: var(--accent); }

.cmd-body {
  display: none;
  padding: 0 1.1rem 1rem;
  border-top: 1px solid var(--border);
}

.cmd-block.open .cmd-body { display: block; padding-top: 0.85rem; }

.cmd-desc { color: var(--text-muted); font-size: 0.88rem; margin: 0 0 0.5rem; }

.search-empty {
  text-align: center;
  padding: 2rem;
  color: var(--text-muted);
  font-size: 0.9rem;
  display: none;
}

.search-empty.visible { display: block; }

/* ── Accordion (problems) ── */
.accordion {
  margin: 1rem 0;
}

.accordion-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 0.5rem;
  overflow: hidden;
  background: var(--bg-card);
  transition: border-color var(--transition);
}

.accordion-item.open { border-color: var(--border-strong); }

.accordion-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1.1rem;
  background: none;
  border: none;
  color: var(--text);
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  transition: background var(--transition);
}

.accordion-trigger:hover { background: rgba(110, 231, 183, 0.04); }

.accordion-icon {
  color: var(--accent);
  font-size: 0.75rem;
  transition: transform var(--transition);
  flex-shrink: 0;
}

.accordion-item.open .accordion-icon { transform: rotate(180deg); }

.accordion-panel {
  display: none;
  padding: 0 1.1rem 1rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.92rem;
}

.accordion-item.open .accordion-panel { display: block; padding-top: 0.85rem; }

.accordion-panel ul, .accordion-panel ol { color: var(--text); }
.accordion-panel p:last-child { margin-bottom: 0; }

/* ── Footer in content ── */
footer, .page-footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.82rem;
}

.page-footer a { margin: 0 0.25rem; }

/* ── Toast ── */
.toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  padding: 0.65rem 1.25rem;
  background: rgba(14, 22, 38, 0.95);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 500;
  z-index: 100;
  opacity: 0;
  transition: all 0.3s ease;
  pointer-events: none;
  backdrop-filter: blur(12px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ── Overlay (mobile) ── */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 40;
  backdrop-filter: blur(2px);
}

.overlay[hidden] { display: none; }

/* ── Responsive ── */
@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }

  .sidebar {
    position: fixed;
    left: 0; top: 0;
    width: var(--sidebar-w);
    z-index: 50;
    transform: translateX(-100%);
    transition: transform var(--transition);
  }

  .sidebar.open { transform: translateX(0); }

  .sidebar-close {
    display: block;
    position: absolute;
    top: 1rem; right: 1rem;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    line-height: 1;
  }

  .menu-toggle { display: flex; }

  .main { padding: 1.25rem 1.25rem 3rem; }

  .hero { margin-left: 0; margin-right: 0; }

  .search-kbd { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}